[OpenIndiana-discuss] General ZFS questions (Michelle Knight)

[Gary Gendel]

Michelle,

Though I generally agree with the advice that you received, I take an 
exception to the statement that checksums "always" indicate hardware or 
driver failure.  As a long-time raidz user, I can attest to the fact 
that, occasionally, changes to the zfs code have wreaked havoc with 
raidz.  In one build I tried an even number of disks works but an odd 
number produces checksum errors.

That said...  Have you run scrubs back to back?  If so, do you always 
get checksum errors and do they occur in different places? On a similar 
problem such as yours, I discovered that the scrub was introducing 
checksum errors.  I tracked it down to elevated temperatures during the 
scrub, which really pounds at the disks.  Better cooling on the disk 
tower resolved the problem.

Gary